Ecosystèmes Tropicaux
10.0K views | +1 today
Follow
 
Ecosystèmes Tropicaux
Veille sur les écosystèmes tropicaux. Réalisée par Agroparistech - Centre de Montpellier - A. Filatre
Your new post is loading...
Your new post is loading...
Scooped by AgroParisTech Documentation Annabelle Filatre
Scoop.it!

Variation of main terrestrial carbon stocks at the landscape-scale are shaped by soil in a tropical rainforest

Publication date: 1 March 2018
Source:Geoderma, Volume 313
Author(s): Armando Navarrete-Segueda, Miguel Martínez-Ramos, Guillermo Ibarra-Manríquez, Lorenzo Vázquez-Selem, Christina Siebe
Economic incentives to offset carbon dioxide (CO2) emissions associated with deforestation and other human activities affecting forest ecosystems depend on robust estimates of changes in forest carbon (C) stocks. Such stocks are difficult to assess in heterogeneous landscapes where the soil properties and the forest structure and functionality vary in space and time. Here we show that geopedological mapping is useful to quantify the above- and belowground C stocks in the different land units of the Lacandon tropical rainforest, southeast Mexico. We used an ordination method to recognize major gradients in the soil and we applied regression analyses to identify relationships between soil properties and AGB. Total forest C stocks differed among land units (287 to 478MgCha−1 in limestone mountains and fluvial terraces, respectively). Soil constrains like rooting depth (ranging from 0.13 to 1.34m), available water storage capacity (ranging from 32.3 to 161.4Lm−2) and Al saturation in the ion exchange complex (0 to 22.6% Alsat) were correlated with the aboveground biomass (AGB) C stock by affecting the stem size and density of trees. Soil organic carbon (SOC) in the solum represented 22 to 46% of the total forest C stock in the different landscape units, of which 28 to 45% was stored below 30cm depth. Therefore, an accurate assessment of forest C stocks must consider not only the variation between land units with contrasting soil properties, but also the solum depth. Our results indicate that stratified sampling based on geopedologic mapping is useful to allocate incentives assessment of C storage at relatively low costs and with reasonable effort.
more...
No comment yet.
Scooped by AgroParisTech Documentation Annabelle Filatre
Scoop.it!

Restoring forest landscapes: A question of community rights

Restoring forest landscapes: A question of community rights | Ecosystèmes Tropicaux | Scoop.it
What does forest landscape restoration mean for tenure, governance and communities? About 30 percent of the earth’s surface is covered by forests, and around 1.6 billion people depend on them for significant contributions to their environments and livelihoods. Yet, 12 million hectares of intact forests are lost in the tropics every year, either through permanent destruction or degradation. Forest Landscape …
more...
No comment yet.
Scooped by AgroParisTech Documentation Annabelle Filatre
Scoop.it!

The impact of climate change and energy resources on biodiversity loss: Evidence from a panel of selected Asian countries

Publication date: March 2018
Source:Renewable Energy, Volume 117
Author(s): Miraj Ahmed Bhuiyan, Musarrat Jabeen, Khalid Zaman, Aqeel Khan, Jamilah Ahmad, Sanil S. Hishan
This study examined the relationships between climate change, energy resources, growth specific factors and their resulting impact on biodiversity loss in a panel of 18 selected Asian countries during the period of 2000–2014. The study employed panel fixed effect regression and panel quantile regression to assess the influence of different factors on biodiversity loss at low, medium, and high levels quantile distribution. The results show that climatic factors increase aquaculture production, whereas energy sources and growth specific factors affected the production of aquaculture in a panel of selected countries. Potential habitat area is affected by high population growth and renewable energy consumption whereas Global Environment Facility (GEF) biodiversity index is affected by average precipitation, foreign direct investment (FDI) inflows, and per capita income. Climatic factors and renewable energy both supported the total fisheries production, whereas nitrous oxide emissions, renewable internal freshwater resources, FDI inflows, per capita income, and population growth affected the production of total fisheries at different quantile distributions.
more...
No comment yet.
Scooped by AgroParisTech Documentation Annabelle Filatre
Scoop.it!

Conservation des écosystèmes forestiers : l'Union européenne accorde 10 milliards de Fcfa au Cameroun - Médiaterre

Conservation des écosystèmes forestiers : l'Union européenne accorde 10 milliards de Fcfa au Cameroun - Médiaterre | Ecosystèmes Tropicaux | Scoop.it
L'actualité du développement durable avec Médiaterre, le système d'information mondial francophone pour le développement durable concourt à la mise en oeuvre du développement durable dans l'espace francophone par la diffusion et l'échange d'informations, et l'aide à la constitution de réseaux de coopération.
more...
No comment yet.
Rescooped by AgroParisTech Documentation Annabelle Filatre from Terre et Eau en région Méditerranéenne
Scoop.it!

An integrated decision support system for the Mediterranean forests - Land Use Policy

An integrated decision support system for the Mediterranean forests - Land Use Policy | Ecosystèmes Tropicaux | Scoop.it

Mediterranean forests contain a relevant biological diversity and are relevant for local economy. However, they are subject to various risks, particularly the risk of forest fires. This turns the critical decisions of forest managers, affecting both the long-term future of the forest and daily activities, to be difficult. To simulate decisions, and help managers and policy makers, a decision support system, which integrates the biological, environmental and economic management perspectives of agricultural and forest areas, was developed and considers the activities existing in the territory. The decision support system considers the characteristics of the biophysical units that comprise the territorial study area, production technologies and conservation of agro-forestry goods and preferences of managers or stakeholders. The proposed approach was applied in a pilot Forest Intervention Zone (FIZ) located within the Algarve region inner land. The results show that the decision support system proposed is an important tool for managing the territory and for implementing the manager's decisions.


Via CIHEAM News
more...
Scooped by AgroParisTech Documentation Annabelle Filatre
Scoop.it!

A review of research on the effects of drought and temperature stress and increased CO2 on Theobroma cacao L., and the role of genetic diversity to address climate change - Forests, Trees and Agrof...

A review of research on the effects of drought and temperature stress and increased CO2 on Theobroma cacao L., and the role of genetic diversity to address climate change - Forests, Trees and Agrof... | Ecosystèmes Tropicaux | Scoop.it
The global status of research on the effects of drought, temperature and elevated carbon dioxide (CO2) levels on the cacao plant, and the role of genetic diversity in producing more resilient cacao, are presented in this report. With the aim to enhance what we know about the resilience of cacao to climate change, and generate a comprehensive understanding of the …
more...
No comment yet.
Scooped by AgroParisTech Documentation Annabelle Filatre
Scoop.it!

European Forest Institute - News

European Forest Institute - News | Ecosystèmes Tropicaux | Scoop.it
The year 2016 was a turning point: the 2030 Agenda for Sustainable Development and its Sustainable Development Goals (SDGs) were adopted, and the Paris Agreement on climate change came into effect. These sent out a global political message of the need to transform our economic system to end poverty, protect the planet, and ensure wellbeing for all.
The critical question now is how to reach the ambitious targets they set. A necessary part of the answer will be the move to a circular bioeconomy to increase the use of renewable non-fossil raw materials and products in sustainable, resource-efficient way. A new From Science to Policy study from the European Forest Institute analyses what a circular bioeconomy strategy would require, particularly in a European context.
Existing bioeconomy strategies have been helpful, but many, for example the EU Bioeconomy Strategy and Action Plan from 2012, have gaps in scope or focus and need updating due to major recent changes and new initiatives. In particular, it is crucial to connect bioeconomy to the circular economy concept, and to mainstream circular bioeconomy within the rest of the economy, not just advance it as a separate sector of interest to mainly rural communities. Forest-based solutions can help to develop and transform the circular bioeconomy from niche to norm.
The study’s key recommendations for a circular bioeconomy strategy include amongst others: the creation of a science-based circular bioeconomy narrative; design policies to support all dimensions of sustainability; abolish subsidies for fossil products and a need for higher and more effective carbon price; investment in R&D; developing EU-level common standards and regulations; and an emphasis on biobased services as well as products.
The report’s main outcomes and policy recommendations will be discussed at the ThinkForest seminar, ‘Looking ahead to a circular European bioeconomy’ in Brussels on 7 November. More information can be found here: http://www.efi.int/portal/policy_advice/thinkforest/upcoming_events/
Further information
Leading the way to a European circular bioeconomy strategy, From Science to Policy 5. European Forest Institute.
Authors: Lauri Hetemäki, Marc Hanewinkel, Bart Muys, Markku Ollikainen, Marc Palahí and Antoni Trasobares
Foreword by Esko Aho, Cristina Narbona Ruiz, Göran Persson and Janez Potočnik
The study is published on 31.10.2017, and is freely downloadable:
http://www.efi.int/files/attachments/publications/efi_fstp_5_2017.pdf

An executive summary is available:
http://www.efi.int/files/attachments/publications/efi_fstp_5_summary_2017.pdf
Further information from Lauri Hetemäki, EFI Assistant Director (lauri.hetemaki @ efi.int)
The European Forest Institute is an unbiased, science-based international organisation that provides the best forest science knowledge and information for better informed policy making. The From Science to Policy series brings together cross-boundary scientific knowledge and expertise to strengthen science-policy dialogue on a focused issue.
This work and publication has been financed by EFI’s Multi-Donor Trust Fund for policy support, which is supported by the Governments of Austria, Czech Republic, Finland, France, Germany, Ireland, Italy, Norway, Spain and Sweden.
more...
No comment yet.
Scooped by AgroParisTech Documentation Annabelle Filatre
Scoop.it!

Le Cameroun renforce sa filière de bois légal | Programme FAO-UE FLEGT | Organisation des Nations Unies pour l'alimentation et l'agriculture

Le Cameroun renforce sa filière de bois légal | Programme FAO-UE FLEGT | Organisation des Nations Unies pour l'alimentation et l'agriculture | Ecosystèmes Tropicaux | Scoop.it
L’amélioration de la transparence dans le secteur forestier, pilier de l’APV, joue un rôle clef dans la mise en place progressive d’une filière bois légale selon un rapport du Programme FAO-UE FLEGT.
more...
No comment yet.
Scooped by AgroParisTech Documentation Annabelle Filatre
Scoop.it!

Déployer la restauration des terres et les énergies renouvelables pour le développement durable dans la Grande Muraille Verte  | Action contre la désertification | Organisation des Nations Unies po...

Déployer la restauration des terres et les énergies renouvelables pour le développement durable dans la Grande Muraille Verte  | Action contre la désertification | Organisation des Nations Unies po... | Ecosystèmes Tropicaux | Scoop.it
Des experts éminents d'Afrique et d'ailleurs sont réunis à Abidjan pour discuter des financements en faveur de l'initiative de la Grande Muraille Verte, principal programme de développement rural durable en Afrique. L’objectif est de permettre, à travers cette initiative, de soutenir davantage de populations à faire face au changement climatique et à la désertification dans les zones arides d’Afrique.
more...
No comment yet.
Scooped by AgroParisTech Documentation Annabelle Filatre
Scoop.it!

Forests as vital as food: international conference on forest governance opens

Forests should be viewed in the same way as food security because they are vital for ensuring human livelihood needs and security as well as planetary well-being, according to ITTO Executive Director, Dr Gerhard Dieterle. “It is urgent, therefore, to develop sustainable, innovative and efficient ways to provide wood and services to the world’s growing population,” he said. Among other things, this requires an adequate system of forest governance and monitoring.

Dr Dieterle made these remarks in his keynote address at the Tokyo International Conference on Forest Governance Initiative, which commenced today with the aim of tackling illegal logging in the tropics through satellite technologies and improved governance.
more...
No comment yet.
Scooped by AgroParisTech Documentation Annabelle Filatre
Scoop.it!

Protection du Bassin du Congo : Greenpeace en campagne de sensibilisation au Cameroun - Médiaterre

L'actualité du développement durable avec Médiaterre, le système d'information mondial francophone pour le développement durable concourt à la mise en oeuvre du développement durable dans l'espace francophone par la diffusion et l'échange d'informations, et l'aide à la constitution de réseaux de coopération.
more...
No comment yet.
Scooped by AgroParisTech Documentation Annabelle Filatre
Scoop.it!

Webinar: Rural youth and livelihood change - Forests, Trees and Agroforestry

Webinar: Rural youth and livelihood change - Forests, Trees and Agroforestry | Ecosystèmes Tropicaux | Scoop.it
Join us for a webinar on “Rural youth and livelihood change” Wednesday October 18 from 3.30 – 4.30PM CEST. This webinar is jointly organized by The CGIAR Research Program on Forests, Trees and Agroforestry (FTA) and the CGIAR Collaborative Platform for Gender Research. REGISTER FOR THE WEBINAR HERE Background and purpose of webinar Increasingly development reports and media cite the so-called …
more...
No comment yet.
Scooped by AgroParisTech Documentation Annabelle Filatre
Scoop.it!

La filière charbon de bois s'organise au Cameroun - Médiaterre

La filière charbon de bois s'organise au Cameroun - Médiaterre | Ecosystèmes Tropicaux | Scoop.it
L'actualité du développement durable avec Médiaterre, le système d'information mondial francophone pour le développement durable concourt à la mise en oeuvre du développement durable dans l'espace francophone par la diffusion et l'échange d'informations, et l'aide à la constitution de réseaux de coopération.
more...
No comment yet.
Scooped by AgroParisTech Documentation Annabelle Filatre
Scoop.it!

Critical review of the impacts of grazing intensity on soil organic carbon storage and other soil quality indicators in extensively managed grasslands

Publication date: 1 February 2018
Source:Agriculture, Ecosystems & Environment, Volume 253
Author(s): M. Abdalla, A. Hastings, D.R. Chadwick, D.L. Jones, C.D. Evans, M.B. Jones, R.M. Rees, P. Smith
Livestock grazing intensity (GI) is thought to have a major impact on soil organic carbon (SOC) storage and soil quality indicators in grassland agroecosystems. To critically investigate this, we conducted a global review and meta-analysis of 83 studies of extensive grazing, covering 164 sites across different countries and climatic zones. Unlike previous published reviews we normalized the SOC and total nitrogen (TN) data to a 30cm depth to be compatible with IPCC guidelines. We also calculated a normalized GI and divided the data into four main groups depending on the regional climate (dry warm, DW; dry cool, DC; moist warm, MW; moist cool, MC). Our results show that taken across all climatic zones and GIs, grazing (below the carrying capacity of the systems) results in a decrease in SOC storage, although its impact on SOC is climate-dependent. When assessed for different regional climates, all GI levels increased SOC stocks under the MW climate (+7.6%) whilst there were reductions under the MC climate (−19%). Under the DW and DC climates, only the low (+5.8%) and low to medium (+16.1%) grazing intensities, respectively, were associated with increased SOC stocks. High GI significantly increased SOC for C4-dominated grassland compared to C3-dominated grassland and C3-C4 mixed grasslands. It was also associated with significant increases in TN and bulk density but had no effect on soil pH. To protect grassland soils from degradation, we recommend that GI and management practices should be optimized according to climate region and grassland type (C3, C4 or C3-C4 mixed).
more...
No comment yet.
Scooped by AgroParisTech Documentation Annabelle Filatre
Scoop.it!

Impact of plant root functional traits and associated mycorrhizas on the aggregate stability of a tropical Ferralsol - ScienceDirect

Publication date: 15 February 2018
Source:Geoderma, Volume 312
Author(s): Julien Demenois, Fabian Carriconde, Pauline Bonaventure, Jean-Luc Maeght, Alexia Stokes, Freddy Rey
In many tropical regions, such as New Caledonia, soil erosion from anthropogenic activities and subsequent ecological restoration are major issues that require detailed soil and vegetation data for the production of management plans. To determine if some plant species are more useful for stabilizing soil aggregates and thus reducing erodibility, we examined three species endemic to New Caledonia, and measured how root traits and associated mycorrhizas and fungi influenced Ferralsol aggregate stability (MWD). The three species are hosts to different types of mycorrhizas and were: (i) the sedge Costularia arundinacea (Sol. Ex Vahl) Kük., an AMF (arbuscular mycorrhizal fungi) host, (ii) the shrub Tristaniopsis glauca Brongn. & Gris and (iii) the tree Arillastrum gummiferum (Pancher ex Brongn. & Gris) Baill., both of the latter are ectomycorrhizal fungi (ECM) hosts. Fungal abundance, aggregate stability, soil organic carbon (SOC), iron (Fe) and aluminium (Al) sesquioxides were measured in the soil beneath 20 individuals for each species, as well as in 20 control samples of bare soil. Root functional traits including root mass density (RMD), root length density (RLD) and percentage of fine roots were measured on all individuals. Results showed that plant species can significantly influence soil aggregate stability. MWD was greater in soil beneath Costularia characterized by high RMD, RLD, percentage of fine roots and fungal abundance, while MWD in the rhizosphere of Tristaniopsis and Arillastrum was similar to that of bare soil. Fe and Al were very high in all soil samples and are suspected of masking the influence of roots, fungi and SOC on MWD at the scale of isolated ECM-hosts. Therefore, MWD alone would not be a relevant predictor of restoration on such soil and further investigations should be carried out to identify a set of predictors useful for indicating the restoration of degraded soils on ultramafic substrates.
more...
No comment yet.
Scooped by AgroParisTech Documentation Annabelle Filatre
Scoop.it!

COP 23 | Le Cirad mobilisé sur le stockage du carbone dans les sols - CIRAD

COP 23 | Le Cirad mobilisé sur le stockage du carbone dans les sols : Organisée par les Iles Fidji, la 23e Conférence des parties à la convention-cadre des Nations-Unies sur les changements climatiques (COP23) « Viser plus loin, plus vite et tous ensemble », s
more...
No comment yet.
Scooped by AgroParisTech Documentation Annabelle Filatre
Scoop.it!

Gestion durable des ressources forestières : l'appui du PNDP à cinq communes camerounaises - Médiaterre

Gestion durable des ressources forestières : l'appui du PNDP à cinq communes camerounaises - Médiaterre | Ecosystèmes Tropicaux | Scoop.it
L'actualité du développement durable avec Médiaterre, le système d'information mondial francophone pour le développement durable concourt à la mise en oeuvre du développement durable dans l'espace francophone par la diffusion et l'échange d'informations, et l'aide à la constitution de réseaux de coopération.
more...
No comment yet.
Scooped by AgroParisTech Documentation Annabelle Filatre
Scoop.it!

Governing mangroves: From Tanzania to Indonesia - Forests, Trees and Agroforestry

Governing mangroves: From Tanzania to Indonesia - Forests, Trees and Agroforestry | Ecosystèmes Tropicaux | Scoop.it
Mangroves constitute only 0.5 percent of forest area worldwide, but millions of people depend on them for food, income and protection of coastlines against erosion. Since 1980, about one-fifth of the world’s mangroves have disappeared. Although human pressures are a major threat, little is known about the governance conditions that facilitate long-term conservation and restoration of these coastal forests — …
more...
No comment yet.
Scooped by AgroParisTech Documentation Annabelle Filatre
Scoop.it!

ITTO shares its experience to improve forest data

ITTO shares its experience to improve forest data | Ecosystèmes Tropicaux | Scoop.it
ITTO shared its experience in data collection, validation, analysis and dissemination at a recent statistical workshop organized by the Food and Agriculture Organization of the United Nations (FAO).

The aim of the workshop, which was held in Viana do Castelo, Portugal, on 9?11 October 2017, was to strengthen capacity in the collection, analysis and reporting of forest statistics in Portuguese-speaking countries. Participants attended from Angola, Brazil, Cabo Verde, Guinea-Bissau, Mozambique, Portugal and Sao Tome and Principe, and the Portuguese industry associations AIMMP, APCOR, CELPA and Centro Pinus were represented.
more...
No comment yet.
Scooped by AgroParisTech Documentation Annabelle Filatre
Scoop.it!

Faire avancer ensemble la cause de l’agroécologie - Gret

Faire avancer ensemble la cause de l’agroécologie - Gret | Ecosystèmes Tropicaux | Scoop.it
A travers son engagement au sein de réseaux et de collectifs, le Gret contribue à enrichir les connaissances, à diffuser [Lire la suite]
more...
No comment yet.
Scooped by AgroParisTech Documentation Annabelle Filatre
Scoop.it!

Research on Climate Change Policies and Rural Development in Latin America: Scope and Gaps - Forests, Trees and Agroforestry

Research on climate change policies can contribute to policy development by building an understanding of the barriers faced in policy processes, and by providing knowledge needed throughout policy cycles. This paper explores the thematic coverage of research on climate change policies related to rural areas, rural development, and natural resource management in Latin America. A three-tier framework is proposed to …
more...
No comment yet.
Scooped by AgroParisTech Documentation Annabelle Filatre
Scoop.it!

Smallholder finance in the oil palm sector: Analyzing the gaps between existing credit schemes and smallholder realities - Forests, Trees and Agroforestry

There are about 2 million smallholders cultivating 40% of Indonesia’s oil palm area. They require significant financing to establish, maintain and replant their oil palm plantations, in order to both increase productivity and improve the quality of the fresh fruit bunches. Their capacity to self-finance their plantation is limited. However, most of them are credit-constrained. Since the late 1970s, the …
more...
No comment yet.
Scooped by AgroParisTech Documentation Annabelle Filatre
Scoop.it!

Un procédé photométrique pour résoudre le casse-tête de la mesure du diamètre des arbres à contreforts / Actualités - Unité de recherche Cirad - Forêts et sociétés

Un article publié dans la revue [[Methods in Ecology and Evolution]] propose une méthode photométrique de mesure des diamètres des arbres forestiers à contreforts, ces arbres qui posent tant de difficultés pour le suivi de croissance au sein de placettes de suivi permanentes. Sylvie Gourlet-Fleury, de l'unité de recherche [[Forêts et Sociétés]], en est co-auteur.
more...
No comment yet.
Scooped by AgroParisTech Documentation Annabelle Filatre
Scoop.it!

Un fonds pour la mise en valeur du Bassin du fleuve Congo

Un fonds pour la mise en valeur du Bassin du fleuve Congo | Ecosystèmes Tropicaux | Scoop.it

Les pays d'Afrique de l'est et du centre s'engagent à initier plusieurs actions pour préserver la diversité du bassin du fleuve Congo.

more...
No comment yet.
Scooped by AgroParisTech Documentation Annabelle Filatre
Scoop.it!

Supporting community forest management in the Brazilian Amazon

Supporting community forest management in the Brazilian Amazon | Ecosystèmes Tropicaux | Scoop.it
ITTO has long encouraged sustainable community forest management as a core part of its work. A good example of its support features in a new video in Portuguese, “Community forest management: a sustainable alternative for the Mau?s State Forest”, produced by ITTO project PD 454/07 Rev.3 (F). The project is helping 19 local communities in the Mau?s State Forest in the Brazilian Amazon to implement good forest management by strengthening community organization, building capacity in the preparation of sound forest management plans, and improving skills in running community forest enterprises.
more...
No comment yet.